The patch titled Subject: mm/page_alloc: make pcpu_drain_mutex and pcpu_drain static has been added to the -mm tree. Its filename is mm-page_alloc-make-pcpu_drain_mutex-and-pcpu_drain-static.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-make-pcpu_drain_mutex-and-pcpu_drain-static.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-page_alloc-make-pcpu_drain_mutex-and-pcpu_drain-static.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Jason Yan <yanaijie@xxxxxxxxxx> Subject: mm/page_alloc: make pcpu_drain_mutex and pcpu_drain static Fix the following sparse warning: mm/page_alloc.c:106:1: warning: symbol 'pcpu_drain_mutex' was not declared. Should it be static? mm/page_alloc.c:107:1: warning: symbol '__pcpu_scope_pcpu_drain' was not declared. Should it be static? Link: http://lkml.kernel.org/r/20200407023925.46438-1-yanaijie@xxxxxxxxxx Signed-off-by: Jason Yan <yanaijie@xxxxxxxxxx> Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_alloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/page_alloc.c~mm-page_alloc-make-pcpu_drain_mutex-and-pcpu_drain-static +++ a/mm/page_alloc.c @@ -103,8 +103,8 @@ struct pcpu_drain { struct zone *zone; struct work_struct work; }; -DEFINE_MUTEX(pcpu_drain_mutex); -DEFINE_PER_CPU(struct pcpu_drain, pcpu_drain); +static DEFINE_MUTEX(pcpu_drain_mutex); +static DEFINE_PER_CPU(struct pcpu_drain, pcpu_drain); #ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY volatile unsigned long latent_entropy __latent_entropy; _ Patches currently in -mm which might be from yanaijie@xxxxxxxxxx are mm-page_alloc-make-pcpu_drain_mutex-and-pcpu_drain-static.patch